"This gives you a chance to wonder about the enemy within, because that's what this story is about, " says Samuel L. Jackson, who plays one of the explorers.

CNN: 'Sphere' takes moviegoers to new depths

Ironically, the enemy within is all in the Zuckerberg family.

FORBES: Hollywood, Silicon Valley At War in Sun Valley

It charts Margaret Thatcher's permanent struggle in 11 long years in office against the doubters in her own party, those she regarded as "the enemy within" - whether in the trade unions or the IRA - and "the enemy without" - Soviet Communists and the Argentine junta who ordered the invasion of the Falklands.

BBC: The Iron Lady

His priority must be to heal the rifts within the Republican party and to turn John McCain into an ally, not an enemy.

BBC: The establishment strikes back

Meier said there are many concepts that work really well in a computer game, like fog of war -- not being able to see all the pieces on the board until your units are within range of enemy units.

CNN: The rebirth of turn-based strategy games

This struggle will take time - time to root out enemy fighters and supporters within Iraq, time to gain control of the borders, and most of all time to help the Iraqis rebuild their political and security institutions to the point that they'll be able to take over the main burden of the fight.

CENTERFORSECURITYPOLICY: Remarks to the Council on Foreign Relations

This makes it hard, for instance, to compare real-time video images (from a camera in the nose-cone of a missile, for example) with a set of several thousand targets (pictures of enemy aircraft, say), because all the targets have to be tested within a thirtieth of a second, the duration of a single frame of video.

ECONOMIST: Optical recognition

There is a conflict hiding within every mass legal settlement: In exchange for securing peace with the enemy, plaintiff lawyers must negotiate a little something for themselves.

FORBES: Nextel Labor Settlement Was Great Deal For Lawyers, If Not Their Clients